Answer: This is a survey
Step-by-step explanation:
A survey occurs when a researcher has a particular topic that she or he wants to know or wants to see how people feel or react to that topic.
In the above instance the researcher wanted to know the attitude of students towards school and he conducted a survey from lower grade to upper grade.
For a researcher to obtain a much more reliable and realistic information he has to gather it from a large number of participants or people hence in this case the large number of students that we see.